Masonry drill bit



FIG. 1 is a front view of a complete masonry drill bit with a main cutting insert and with an auxiliary cutting insert bearing the design;

FIG. 2 is a back view of the masonry drill bit of FIG. 1;

FIG. 3 is a left view of the masonry drill bit of FIG. 1;

FIG. 4 is a right view of the masonry drill bit of FIG. 1;

FIG. 5 is a top view of the masonry drill bit of FIG. 1;

FIG. 6 is a bottom view of the masonry drill bit of FIG. 1;

FIG. 7 is a first enlarged detail perspective view of the masonry drill bit of FIG. 1;

FIG. 8 is a second enlarged detail perspective view of the masonry drill bit of FIG. 1; and,

FIG. 9 is a third enlarged detail perspective view of the masonry drill bit of FIG. 1.

The portions included in the broken line boxes/cubes in the drawings depicted in broken line format form no part of the claimed design. 

CLAIM The ornamental design for a masonry drill bit, as shown and described. 